I downloaded Xcode 7.1 from the App Store today after working from 7.1 beta downloads from developer.apple.com and have a new iOS app build to upload. So I did:
I met the same issue today and I think it is a bug of Xcode 7.1
Finally I managed to submit my app via Application Loader. There were warnings but it did work.
Here are the basic steps:
Having the same problems as all of you, just thought I'd share that I found a way to Validate successfully, you have to disable the "Include bitcode" checkbox before moving forward. As for the actual upload to App Store, no work around for that one other than use the Application Loader...
Also I've been seeing this too since XCode 6.4, but it seems once the current version has a couple of months after it's originally released it starts working again... fingers crossed that it starts working again soon, because uploading straight from Organizer is so much better. (I saw the Beta Version post, when I say after a couple of months for current version I'm not talking about Beta versions, just in case ;) )
Disable the "Include bitcode" checkbox worked for me.
Happens here if the dev account is only admin. I had to use the central account for uploading our apps. I think this problem startet sometime with XCode 6. Didnt investigate further though since Application Loader works in cases when I dont have access to the central account.
I also have the same problem today.
Finally, I used the application loader to upload successfully,too.
Theres a few solutions I have come across to solve this issue.
Most common being to remove and re-add your developer account. This won't work on its own though, you need to also 'view details' on your account and have Xcode download your provisioning profiles again.
The other alternative is to upload your build using application loader. The disadvantage to using this solution is that should you be trying to upload using a beta build of Xcode or OSX you won't be able to change your apps .plist in the archive folder to trick iTunes connect into accepting it. In this instance all you have access to is your ipa.